CN109847699A

CN109847699A - A kind of denitrification and phosphorus removal composite filler and preparation method thereof

Info

Publication number: CN109847699A
Application number: CN201910124727.3A
Authority: CN
Inventors: 牛勇; 牛远; 余辉; 姜霞; 王坤
Original assignee: Chinese Research Academy of Environmental Sciences
Current assignee: Chinese Research Academy of Environmental Sciences
Priority date: 2019-02-15
Filing date: 2019-02-15
Publication date: 2019-06-07

Abstract

The present invention provides a kind of denitrogenation dephosphorizing compounded mixs, belong to polluted-water and administer and recovery technique field.The present invention provides denitrogenation dephosphorizing compounded mix and is made of the raw material of following parts by weight: 10-100 parts of zeolite powder, 5-50 parts of active carbon and 2-40 parts of iron powder, the present invention discloses denitrogenation dephosphorizing compounded mix using zeolite powder, active carbon and iron powder as raw material, by the weight ratio for rationally controlling three, and partial size, the denitrogenation dephosphorizing compounded mix made have excellent water treatment efficiency；Interaction can be obviously shortened the time of sewage treatment between each raw material of compounded mix provided by the invention, it is ensured that the efficient process that sewage is realized in the short time has ideal removal effect to nitrogen phosphorus.

Description

A kind of denitrogenation dephosphorizing compounded mix and preparation method

Technical field

It is administered the invention belongs to polluted-water and recovery technique field, and in particular to a kind of denitrogenation dephosphorizing compounded mix and system Preparation Method.

Background technique

China is the country of shortage of water resources, with the expanding economy of existing ground, especially urbanization and process of industrialization The phenomenon that quickening of development, city and water shortage from far-off regions, gets worse, and a large amount of rows of industrial wastewater and sanitary wastewater It puts and also brings very big problem to social development and the pollution of water resource, however Non-aqueous processing becomes prevention and treatment water environment pollution One of important means, the effect of sewage treatment directly affect a regional quality of water environment.The main feature of water resource pollution The organic pollution and eutrophication of water body, especially with the nutriments such as nitrogen, phosphorus it is exceeded caused by water eutrophication it is existing As getting worse, a large amount of nitrogenous, phosphorus discharge of wastewater not only make sewage treatment plant's processing load aggravation, also make China face compared with For severe water eutrophication problem.Therefore, mark transformation is proposed from sewage treatment plant, Water Ecological Recovery etc. becomes national water pollution The vital task for preventing and treating development.

In existing sewage treatment, by two methods of chemical dephosphorization and biological phosphate-eliminating, biological phosphate-eliminating is a kind of phase for the removal of phosphorus To economic phosphorus removing method, when Wastewater Treated by Activated Sludge Process sewage, activated sludge is alternately run under anaerobic and aerobic state, energy Make the phosphatic phosphorus fungus dominance growth of excess accumulation, keeps activated sludge phosphorus content higher than ordinary activated sludge.Product in sludge Phosphorus bacterium discharges phosphorus under anaerobic state, excessively absorbs phosphorus under aerobic state.By discharging rich phosphorus excess sludge, result with Conventional activated sludge process is compared, and can remove more phosphorus in sewage.Chemical dephosphorization be by chemisorption or chemical precipitation come It completes.Chemical precipitation refers to by adding inorganic metal salt medicament into sludge, or electrolysis iron plate discharges iron ion, with In sewage after deliquescent phosphate mixing, the substance of graininess, non-solubility is formed, passes through the phosphorus in precipitating removal sludge. In order to generate phosphate compounds, the chemical agent for chemical dephosphorization is mainly metal salt medicament and calcium hydroxide (ripe stone Ash).After many high volence metal ion adding of agent are into sewage, all indissoluble can be generated with the dissolved phosphorus ions binding in sewage The compound of solution property.For economic reasons, the metal salt medicament for phosphorus precipitating is mainly Fe³⁺、Al³⁺And Fe²⁺Salt and lime. Chemisorption is to take out adsorbent material by the phosphorus in the material absorption effluent with adsorption function after reaching saturation and solved Absorption, then adsorbent material is reused.Biological Phosphorus Removal Processes require sludge to be removed, cannot remove the small of sludge Scale processing in can not use, although and chemical precipitation method dephosphorization has the characteristics that phosphor-removing effect is good, medicament is costly.

In order to alleviate effluent problem, Water Ecological Recovery etc. becomes the vital task of national water prevention and cure of pollution development, in technology In terms of measure, since natural zeolite is from a wealth of sources, cheap and its absorption property, ion-exchange performance and easily for having The characteristics of regeneration, is usually used in handling nitrogen, phosphorus in sewage.

For example, disclosed in Chinese patent application 201110134017.2 a kind of synchronous denitrification dephosphorizing bio-filter stuffing and Preparation method, wherein the raw material of synchronous denitrification dephosphorizing bio-filter stuffing is zeolite ore and cement, zeolite ore and cement Mass ratio be 3:1-1:4；Preparation method is the zeolite powder that zeolite ore is crushed to obtain 30-80 mesh, by zeolite powder Mixture is obtained with cement mixing, obtained mixture is formed by balling-up disc molding or by extruder to obtain partial size 2- The particle of 10mm obtains finished product in room temperature static no less than 10 days.Material porosity of the present invention is high, aperture is big, and microorganism can be with Go deep into particle internal voids, as bio-filter stuffing, microbial load amount is big.Nitre in waste water is completed under microbial action Change, the effect of denitrification denitrogenation and adsorption and dephosphorization, but is 20 days according to its runing time of the description of this application, runing time It is too long.

For another example, a kind of denitrogenation based on synthetic zeolite from flyash is disclosed in Chinese patent application 201410186911.8 to remove Phosphate material and preparation method thereof and regeneration technology, first with flyash obtain synthetic zeolite, then with synthetic zeolite, peat and Cement is raw material, and under the action of foaming agent, obtains denitrogenation dephosphorizing material；Gained denitrogenation dephosphorizing material is completed to nitrogen and phosphorus Absorption after, impregnated using hydrochloric acid solution, regeneration can be realized.The invention raw material sources are extensive, at low cost；The hole of synthetic zeolite Gap rate is higher, and being further processed by foaming agent is being adsorbed so that gained denitrogenation dephosphorizing material has biggish porosity When effectively prevent the blocking of its duct, ensure that going on smoothly for absorption, but the detection provided according to this application embodiment 1-3 As a result it is 50% or so to the removal rate of ammonia nitrogen, and the removal rate to phosphorus is only 30% or so, is not able to satisfy the processing mark of sewage It is quasi-.

Summary of the invention

In order to solve above-mentioned sewage treatment technical problem not up to standard or larger using limitation, the present invention provides one For kind with zeolite compounded mix as main component, which also contains iron powder and active carbon, and the present invention passes through rational proportion, Make interaction between each ingredient make the compounded mix of preparation that there is excellent water treatment efficiency, can be used for sewage treatment plant's tail The improvement of the water qualities such as water and urban landscape water.

The present invention in view of the above-mentioned deficiencies in the prior art, provides a kind of de- with excellent water treatment efficiency Nitrogen dephosphorization compounded mix.

The technical scheme to solve the above technical problems is that

A kind of denitrogenation dephosphorizing compounded mix, the compounded mix are made of the raw material of following parts by weight: zeolite powder 10- 100 parts, 5-50 parts of active carbon and 2-40 parts of iron powder.

Preferably, the compounded mix is made of the raw material of following parts by weight: 25-95 parts of zeolite powder, active carbon 10-45 Part and iron powder 5-45 parts.

More preferably, compounded mix described in the compounded mix is made of the raw material of following parts by weight: zeolite powder 30- 90 parts, 15-40 parts of active carbon and 10-40 parts of iron powder.

It is further preferred that the compounded mix is made of the raw material of following parts by weight: 35-85 parts of zeolite powder, activity 20-35 parts and iron powder 15-35 parts of charcoal.

It is further preferred that the compounded mix is made of the raw material of following parts by weight: 40-80 parts of zeolite powder is lived Property 25-30 parts of charcoal and iron powder 20-30 parts.

It is further preferred that the compounded mix is made of the raw material of following parts by weight: 50-70 parts of zeolite powder is lived Property 25-30 parts of charcoal and iron powder 25-30 parts.

The partial size of the zeolite is 80-100 mesh.

The partial size of the active carbon is 35-60 mesh.

The granularity of the iron powder is 40-150um.

Preferably, the ratio between parts by weight of the zeolite powder, active carbon and iron powder are 2:1:0.5-0.8；It is preferred that For 2:1:0.5-0.7；It is further preferably 2:1:0.5-0.6, further preferably 2:1:0.5.

In some embodiments, compound when the ratio between parts by weight of zeolite powder, active carbon and iron powder are 2:1:0.8 The effect of the denitrogenation dephosphorizing of filler are as follows: adsorption time 18h, nitrogen-removing rate 82.3-83.5%, dephosphorizing rate 97.5-99.5% are multiple The specific surface area for closing filler is 2100 ± 150m²/g。

The compounded mix is made of the raw material of following parts by weight: 10 parts of zeolite powder, 5 parts of active carbon and 4 parts of iron powder；

Or, the compounded mix is made of the raw material of following parts by weight: 15 parts of zeolite powder, 7.5 parts of active carbon and iron powder 6 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 20 parts of zeolite powder, 10 parts of active carbon and iron powder 8 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 25 parts of zeolite powder, 12.5 parts of active carbon and iron powder 10 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 30 parts of zeolite powder, 15 parts of active carbon and iron powder 12 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 35 parts of zeolite powder, 17.5 parts of active carbon and iron powder 14 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 40 parts of zeolite powder, 20 parts of active carbon and iron powder 16 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 45 parts of zeolite powder, 22.5 parts of active carbon and iron powder 18 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 50 parts of zeolite powder, 25 parts of active carbon and iron powder 20 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 55 parts of zeolite powder, 27.5 parts of active carbon and iron powder 22 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 60 parts of zeolite powder, 30 parts of active carbon and iron powder 24 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 65 parts of zeolite powder, 32.5 parts of active carbon and iron powder 26 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 70 parts of zeolite powder, 35 parts of active carbon and iron powder 28 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 75 parts of zeolite powder, 37.5 parts of active carbon and iron powder 30 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 80 parts of zeolite powder, 40 parts of active carbon and iron powder 32 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 85 parts of zeolite powder, 42.5 parts of active carbon and iron powder 34 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 90 parts of zeolite powder, 45 parts of active carbon and iron powder 36 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 95 parts of zeolite powder, 47.5 parts of active carbon and iron powder 38 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 100 parts of zeolite powder, 50 parts of active carbon and iron powder 40 parts.

In other embodiments, multiple when the ratio between parts by weight of zeolite powder, active carbon and iron powder are 2:1:0.7 Close the effect of the denitrogenation dephosphorizing of filler are as follows: adsorption time 18h, nitrogen-removing rate 83.6-84.8%, dephosphorizing rate 97.7-99.6%, The specific surface area of compounded mix is 2155 ± 125m²/g。

The compounded mix is made of the raw material of following parts by weight: 10 parts of zeolite powder, 5 parts of active carbon and 3.5 parts of iron powder；

Or, the compounded mix is made of the raw material of following parts by weight: 15 parts of zeolite powder, 7.5 parts of active carbon and iron powder 5.25 part；

Or, the compounded mix is made of the raw material of following parts by weight: 20 parts of zeolite powder, 10 parts of active carbon and iron powder 7 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 25 parts of zeolite powder, 12.5 parts of active carbon and iron powder 8.75 part；

Or, the compounded mix is made of the raw material of following parts by weight: 30 parts of zeolite powder, 15 parts of active carbon and iron powder 10.5 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 35 parts of zeolite powder, 17.5 parts of active carbon and iron powder 12.25 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 40 parts of zeolite powder, 20 parts of active carbon and iron powder 14 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 45 parts of zeolite powder, 22.5 parts of active carbon and iron powder 15.75 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 50 parts of zeolite powder, 25 parts of active carbon and iron powder 17.5 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 55 parts of zeolite powder, 27.5 parts of active carbon and iron powder 19.25 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 60 parts of zeolite powder, 30 parts of active carbon and iron powder 21 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 65 parts of zeolite powder, 32.5 parts of active carbon and iron powder 22.75 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 70 parts of zeolite powder, 35 parts of active carbon and iron powder 24.5 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 75 parts of zeolite powder, 37.5 parts of active carbon and iron powder 26.25 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 80 parts of zeolite powder, 40 parts of active carbon and iron powder 28 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 85 parts of zeolite powder, 42.5 parts of active carbon and iron powder 29.75 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 90 parts of zeolite powder, 45 parts of active carbon and iron powder 31.5 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 95 parts of zeolite powder, 47.5 parts of active carbon and iron powder 33.25 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 100 parts of zeolite powder, 50 parts of active carbon and iron powder 35 parts.

In other embodiments, multiple when the ratio between parts by weight of zeolite powder, active carbon and iron powder are 2:1:0.6 Close the effect of the denitrogenation dephosphorizing of filler are as follows: adsorption time 18h, nitrogen-removing rate 84.9-86.3%, dephosphorizing rate 98.5-99.7%, The specific surface area of compounded mix is 2250 ± 136m²/g。

The compounded mix is made of the raw material of following parts by weight: 10 parts of zeolite powder, 5 parts of active carbon and 3 parts of iron powder；

Or, the compounded mix is made of the raw material of following parts by weight: 15 parts of zeolite powder, 7.5 parts of active carbon and iron powder 4.5 part；

Or, the compounded mix is made of the raw material of following parts by weight: 20 parts of zeolite powder, 10 parts of active carbon and iron powder 6 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 25 parts of zeolite powder, 12.5 parts of active carbon and iron powder 7.5 part；

Or, the compounded mix is made of the raw material of following parts by weight: 30 parts of zeolite powder, 15 parts of active carbon and iron powder 9 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 35 parts of zeolite powder, 17.5 parts of active carbon and iron powder 10.5 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 40 parts of zeolite powder, 20 parts of active carbon and iron powder 12 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 45 parts of zeolite powder, 22.5 parts of active carbon and iron powder 13.5 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 50 parts of zeolite powder, 25 parts of active carbon and iron powder 15 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 55 parts of zeolite powder, 27.5 parts of active carbon and iron powder 16.5 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 60 parts of zeolite powder, 30 parts of active carbon and iron powder 17 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 65 parts of zeolite powder, 32.5 parts of active carbon and iron powder 18.5 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 70 parts of zeolite powder, 35 parts of active carbon and iron powder 20 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 75 parts of zeolite powder, 37.5 parts of active carbon and iron powder 21.5 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 80 parts of zeolite powder, 40 parts of active carbon and iron powder 23 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 85 parts of zeolite powder, 42.5 parts of active carbon and iron powder 24.5 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 90 parts of zeolite powder, 45 parts of active carbon and iron powder 26 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 95 parts of zeolite powder, 47.5 parts of active carbon and iron powder 27.5 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 100 parts of zeolite powder, 50 parts of active carbon and iron powder 29 parts.

In other embodiments, multiple when the ratio between parts by weight of zeolite powder, active carbon and iron powder are 2:1:0.5 Close the effect of the denitrogenation dephosphorizing of filler are as follows: adsorption time 18h, nitrogen-removing rate 86.5-88.6%, dephosphorizing rate 98.5-99.8%, The specific surface area of compounded mix is 2300 ± 168m²/g。

The compounded mix is made of the raw material of following parts by weight: 10 parts of zeolite powder, 5 parts of active carbon and 2.5 parts of iron powder；

Or, the compounded mix is made of the raw material of following parts by weight: 15 parts of zeolite powder, 7.5 parts of active carbon and iron powder 3.75 part；

Or, the compounded mix is made of the raw material of following parts by weight: 20 parts of zeolite powder, 10 parts of active carbon and iron powder 5 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 25 parts of zeolite powder, 12.5 parts of active carbon and iron powder 6.25 part；

Or, the compounded mix is made of the raw material of following parts by weight: 30 parts of zeolite powder, 15 parts of active carbon and iron powder 7.5 part；

Or, the compounded mix is made of the raw material of following parts by weight: 35 parts of zeolite powder, 17.5 parts of active carbon and iron powder 8.75 part；

Or, the compounded mix is made of the raw material of following parts by weight: 40 parts of zeolite powder, 20 parts of active carbon and iron powder 10 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 45 parts of zeolite powder, 22.5 parts of active carbon and iron powder 11.25 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 50 parts of zeolite powder, 25 parts of active carbon and iron powder 12.5 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 55 parts of zeolite powder, 27.5 parts of active carbon and iron powder 13.75 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 60 parts of zeolite powder, 30 parts of active carbon and iron powder 15 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 65 parts of zeolite powder, 32.5 parts of active carbon and iron powder 16.25 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 70 parts of zeolite powder, 35 parts of active carbon and iron powder 17.5 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 75 parts of zeolite powder, 37.5 parts of active carbon and iron powder 18.75 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 80 parts of zeolite powder, 40 parts of active carbon and iron powder 20 Part；

Or, the compounded mix is made of the raw material of following parts by weight: 85 parts of zeolite powder, 42.5 parts of active carbon and iron powder 21.25 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 90 parts of zeolite powder, 45 parts of active carbon and iron powder 22.5 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 95 parts of zeolite powder, 47.5 parts of active carbon and iron powder 23.75 parts；

Or, the compounded mix is made of the raw material of following parts by weight: 100 parts of zeolite powder, 50 parts of active carbon and iron powder 25 parts.

On the other hand, the present invention also provides the preparation methods of above-mentioned denitrogenation dephosphorizing compounded mix, comprising the following steps:

(1) zeolite granular is ground up, sieved, and obtains zeolite powder, spare；

(2) active carbon is sieved, and obtains active powdered carbon, spare；

(3) taking granularity is the iron powder powder of 40-150um, spare；

(4) zeolite powder, iron powder and active powdered carbon are uniformly mixed and obtain ingredient according to formulation dosage；

(5) non-woven fabrics is uniformly sprayed water so that surface wettability, is then coated on non-woven fabrics for ingredient obtained in step (4) One side surface；

(6) non-woven fabrics for being enclosed with ingredient is lain against into fog room, is embedded with ingredient side upward, control the temperature of fog room Degree is 20-25 DEG C, and relative humidity is 30% hereinafter, the 1-2 days non-woven fabrics for obtaining being embedded with ingredient of maintenance；

(7) it finally takes one piece of clean non-textile mulch to obtain above the non-woven fabrics for being embedded with ingredient in step (6), passes through The suture of non-woven fabric dropping welding machine, is prepared into denitrogenation dephosphorizing filler.

Sieving described in above-mentioned steps (1), mesh number are 80-100 mesh, preferably 80 mesh.

Sieving described in above-mentioned steps (2) is to cross 35 meshes first, retains screenings A, screenings A is then crossed 60 mesh Sieve takes oversize B to get the active powdered carbon of required granularity is arrived.

Preferably, the zeolite powder partial size is 80 mesh, and the active carbon mesh number is 35-60 mesh.

Seed-coating machine described in above-mentioned steps (5) is the model YC-1000 of the refined journey experimental instruments and equipment limited production in Shanghai High-efficiency coating machine.

The beneficial effect of denitrogenation dephosphorizing compounded mix prepared by the present invention is:

1, the present invention discloses denitrogenation dephosphorizing compounded mix using zeolite powder, active carbon and iron powder as raw material, by rationally controlling The weight ratio and partial size of three, the denitrogenation dephosphorizing compounded mix made have excellent water treatment efficiency；

2, it interacts and can be obviously shortened at sewage between each raw material in denitrogenation dephosphorizing compounded mix prepared by the present invention The time of reason, it is ensured that the efficient process of sewage is realized in the short time；

3, denitrogenation dephosphorizing compounded mix prepared by the present invention is porous filler, and the property of micropore, which is conducive to increase, compares table Area ensure that going on smoothly for absorption, have ideal removal effect to nitrogen phosphorus；

4, preparation method disclosed by the invention, preparation cost is low, is suitble to large-scale promotion application.

Specific embodiment

Heretofore described iron powder is reduced iron powder, and brand is Mike woods Macklin；Heretofore described zeolite is Jinyun county, Zhejiang province zeolite；Active carbon article No. of the present invention is C112223-500, specification AR, and >=200 mesh are packed, and brand is Aladdin.

A kind of denitrogenation dephosphorizing compounded mix with excellent water treatment efficiency of embodiment 1

Preparation method: the following steps are included:

(1) zeolite granular is ground up, sieved, and obtains zeolite powder, spare；

(2) active carbon is sieved, and obtains active powdered carbon, spare；

(3) taking granularity is the iron powder powder of 40-150um, spare；

(6) non-woven fabrics for being enclosed with ingredient is lain against into fog room, is embedded with ingredient side upward, control the temperature of fog room Degree is 20-25 DEG C, and relative humidity once, conserves the 1-2 days non-woven fabrics for obtaining being embedded with ingredient for 30%；

The effect of the denitrogenation dephosphorizing of compounded mix are as follows: adsorption time 18h, nitrogen-removing rate 82.3%, dephosphorizing rate 98.0%, The specific surface area of compounded mix is 2100 ± 150m²/g。

A kind of denitrogenation dephosphorizing compounded mix with excellent water treatment efficiency of embodiment 2

The compounded mix is made of the raw material of following parts by weight: 45 parts of zeolite powder, 22.5 parts of active carbon and iron powder 18 Part；

Preparation method: the following steps are included:

(1) zeolite granular is ground up, sieved, and obtains zeolite powder, spare；

(2) active carbon is sieved, and obtains active powdered carbon, spare；

(3) taking granularity is the iron powder powder of 40-150um, spare；

The effect of the denitrogenation dephosphorizing of compounded mix are as follows: adsorption time 18h, nitrogen-removing rate 82.9%, dephosphorizing rate 98.1%, The specific surface area of compounded mix is 2100 ± 150m²/g。

A kind of denitrogenation dephosphorizing compounded mix with excellent water treatment efficiency of embodiment 3

The compounded mix is made of the raw material of following parts by weight: 100 parts of zeolite powder, 50 parts of active carbon and 40 parts of iron powder

Preparation method: the following steps are included:

(1) zeolite granular is ground up, sieved, and obtains zeolite powder, spare；

(2) active carbon is sieved, and obtains active powdered carbon, spare；

(3) taking granularity is the iron powder powder of 40-150um, spare；

The effect of the denitrogenation dephosphorizing of compounded mix are as follows: adsorption time 18h, nitrogen-removing rate 83.3%, dephosphorizing rate 98.6%, The specific surface area of compounded mix is 2100 ± 150m²/g。

A kind of denitrogenation dephosphorizing compounded mix with excellent water treatment efficiency of embodiment 4

Preparation method: with embodiment 3.

The effect of the denitrogenation dephosphorizing of compounded mix are as follows: adsorption time 18h, nitrogen-removing rate 83.6%, dephosphorizing rate 98.8%, The specific surface area of compounded mix is 2155 ± 125m²/g。

A kind of denitrogenation dephosphorizing compounded mix with excellent water treatment efficiency of embodiment 5

The compounded mix is made of the raw material of following parts by weight: 70 parts of zeolite powder, 35 parts of active carbon and iron powder 24.5 Part；

Preparation method: with embodiment 3.

The effect of the denitrogenation dephosphorizing of compounded mix are as follows: adsorption time 18h, nitrogen-removing rate 84.2%, dephosphorizing rate 98.5%, The specific surface area of compounded mix is 2155 ± 125m²/g。

A kind of denitrogenation dephosphorizing compounded mix with excellent water treatment efficiency of embodiment 6

The compounded mix is made of the raw material of following parts by weight: 95 parts of zeolite powder, 47.5 parts of active carbon and iron powder 33.25 parts；

Preparation method: with embodiment 3.

The effect of the denitrogenation dephosphorizing of compounded mix are as follows: adsorption time 18h, nitrogen-removing rate 84.7%, dephosphorizing rate 99.2%, The specific surface area of compounded mix is 2155 ± 125m²/g。

A kind of denitrogenation dephosphorizing compounded mix with excellent water treatment efficiency of embodiment 7

The compounded mix is made of the raw material of following parts by weight: 15 parts of zeolite powder, 7.5 parts of active carbon and iron powder 4.5 Part；

Preparation method: with embodiment 3.

The effect of the denitrogenation dephosphorizing of compounded mix are as follows: adsorption time 18h, nitrogen-removing rate 85.0%, dephosphorizing rate 98.7%, The specific surface area of compounded mix is 2250 ± 136m²/g。

A kind of denitrogenation dephosphorizing compounded mix with excellent water treatment efficiency of embodiment 8

The compounded mix is made of the raw material of following parts by weight: 55 parts of zeolite powder, 27.5 parts of active carbon and iron powder 19.25 parts；

Preparation method: with embodiment 3.

The effect of the denitrogenation dephosphorizing of compounded mix are as follows: adsorption time 18h, nitrogen-removing rate 85.6%, dephosphorizing rate 99.2%, The specific surface area of compounded mix is 2250 ± 136m²/g。

A kind of denitrogenation dephosphorizing compounded mix with excellent water treatment efficiency of embodiment 9

The compounded mix is made of the raw material of following parts by weight: 90 parts of zeolite powder, 45 parts of active carbon and iron powder 31.5 Part；

Preparation method: with embodiment 3.

The effect of the denitrogenation dephosphorizing of compounded mix are as follows: adsorption time 18h, nitrogen-removing rate 86.2%, dephosphorizing rate 99.4%, The specific surface area of compounded mix is 2250 ± 136m²/g。

A kind of denitrogenation dephosphorizing compounded mix with excellent water treatment efficiency of embodiment 10

The compounded mix is made of the raw material of following parts by weight: 20 parts of zeolite powder, 10 parts of active carbon and 5 parts of iron powder；

Preparation method: with embodiment 3.

The effect of the denitrogenation dephosphorizing of compounded mix are as follows: adsorption time 18h, nitrogen-removing rate 86.6%, dephosphorizing rate 99.5%, The specific surface area of compounded mix is 2300 ± 168m²/g。

A kind of denitrogenation dephosphorizing compounded mix with excellent water treatment efficiency of embodiment 11

The compounded mix is made of the raw material of following parts by weight: 70 parts of zeolite powder, 35 parts of active carbon and iron powder 17.5 Part；

Preparation method: with embodiment 3.

The effect of the denitrogenation dephosphorizing of compounded mix are as follows: adsorption time 18h, nitrogen-removing rate 87.4%, dephosphorizing rate 99.5%, The specific surface area of compounded mix is 2300 ± 168m²/g。

Embodiment 12

The compounded mix is made of the raw material of following parts by weight: 100 parts of zeolite powder, 50 parts of active carbon and iron powder 25 Part；

Preparation method: with embodiment 3.

The effect of the denitrogenation dephosphorizing of compounded mix are as follows: adsorption time 18h, nitrogen-removing rate 88.5%, dephosphorizing rate 99.6%, The specific surface area of compounded mix is 2300 ± 168m²/g。

Comparative example 1

Difference with embodiment 12 is: the ratio between zeolite powder, parts by weight of active carbon and iron powder are 2:1:1；Other behaviour Make identical as embodiment 12 as step.

The effect of the denitrogenation dephosphorizing of compounded mix are as follows: adsorption time 18h, nitrogen-removing rate 79.6%, dephosphorizing rate 98.5%.

Comparative example 2

Difference with embodiment 12 is: the ratio between zeolite powder, parts by weight of active carbon and iron powder are 2:1:0.2；Other It operates identical as embodiment 12 as step.

The effect of the denitrogenation dephosphorizing of compounded mix are as follows: adsorption time 18h, nitrogen-removing rate 76.2%, dephosphorizing rate 97.9%.

Comparative example 3

Difference with embodiment 12 is: the partial size of zeolite is 50 mesh；Other operations are identical as embodiment 12 as step.

The effect of the denitrogenation dephosphorizing of compounded mix are as follows: adsorption time 18h, nitrogen-removing rate 78.3%, dephosphorizing rate 97.6%.

Comparative example 4

Difference with embodiment 12 is: the activated carbon particle size is 20 mesh；Other operations and step and embodiment 12 It is identical.

The effect of the denitrogenation dephosphorizing of compounded mix are as follows: adsorption time 18h, nitrogen-removing rate 77.8%, dephosphorizing rate 97.2%.

Detection method

Artificial nitrogen phosphorus synthetic wastewater preparation

The configuration of pollutant ammonia nitrogen waste water:

(1) ammonium nitrogen standard banyan liquid: 1000 μ g/mL

Weigh 3.819 ± 0.004g ammonium chloride (NH₄Cl, in 100-05 DEG C of dry 2h), it is soluble in water, it moves into 1000ml and holds In measuring bottle, it is diluted to scale.

(2) ammonium nitrogen standard solution: 10 μ g/mL

10.00ml ammonium nitrogen standard solution is drawn in 1000ml volumetric flask, is diluted to scale, matching while using.

The configuration of pollutant orthophosphates waste water:

(1) phosphorus standard stock solution: the potassium dihydrogen phosphate (KH of the dry 2h in 110 DEG C of driers is weighed₂PO₄)0.2197 ± 0.001g is transferred in 1000mL volumetric flask after being dissolved with water, and about 800mL water and 5L sulfuric acid is added, is finally diluted with water to Graticule simultaneously mixes, this standard solution of 1.00mL contains 50.0 μ g phosphorus (in terms of P), this solution can store at least six in vial Month.

(2) phosphorus standard uses solution: the phosphate stock solution of 10.0mL being transferred in 250mL volumetric flask, is diluted with water It to graticule and mixes, this standard solution of 1.00mL contains 2.0 μ g phosphorus, matching while using.

Processing mode:

20g compounded mix prepared by the present invention is added to the configured artificial wastewater of 1L under the conditions of 20 DEG C -25 DEG C, stands 18 Ammonia nitrogen and orthophosphates concentration are measured after hour.

Removal rate %=(waste strength-processed waste water concentration before handling)/handle preceding waste strength

The compounded mix testing result of embodiment 1-12 preparation see the table below 1.

Table 1

According to the detection data of upper table 1 it is found that the present invention passes through phase interaction between each raw material in rationally control compounded mix It can realize that 18h cleaning is completed with the time that can obviously accelerate sewage treatment, when the parts by weight of zeolite powder, active carbon and iron powder When 2:1:0.5, nitrogen-removing rate can reach 88.5%, and dephosphorizing rate can reach 99.7%, and specific surface area may be up to 2300 ± 168m²/ g, It ensure that going on smoothly for absorption, there is ideal removal effect to nitrogen phosphorus.

In order to further prove that compounded mix provided by the invention has excellent performance, the present invention is to zeolite powder, activity The partial size of the parts by weight and raw material of charcoal and iron powder is adjusted, and detection data see the table below 2.

Table 2

Do not existed according to the detection of upper table 2 this it appears that changing the ratio between zeolite powder, parts by weight of active carbon and iron powder When in control range of the present invention, all there is a degree of reduction in the nitrogen-removing rate and dephosphorizing rate of compounded mix.

The influence of zeolite and activated carbon particle size to compounded mix nitrogen-removing rate and dephosphorizing rate is further had detected to be detected, Test result see the table below 3.

Table 3

Sized zeolite particles	Activated carbon particle size	Example	Nitrogen-removing rate %	Dephosphorizing rate %
					80 mesh	35-60 mesh	Embodiment 12	88.5	99.6
50 mesh	35-60 mesh	Comparative example 3	78.3	97.6
					80 mesh	20 mesh	Comparative example 4	77.8	97.2

According to the testing result of upper table 3, it is apparent that zeolite and active carbon after variation can significantly affect it is compound The nitrogen-removing rate and dephosphorizing rate of filler, when only controlling its partial size in the open scope of the present invention, obtained compounded mix just has Excellent denitrogenates phosphor-removing effect.

Embodiment is described in detail in above content, but the present invention is not by the limit of the above-described embodiment and examples System, without departing from the purpose of the present invention, within the knowledge of those skilled in the art can also to its into Row various changes and modifications, these changes and improvements are each fallen within scope of protection of the present invention.

Claims

1. A denitrifying and dephosphorizing composite filler, characterized in that: the composite filler is composed of the following raw materials by weight: 10-100 parts of zeolite powder, 5-50 parts of activated carbon and 2-40 parts of iron powder.

2 . The composite filler according to claim 1 , wherein the particle size of the zeolite is 80-100 meshes. 3 .

3. The composite filler according to claim 1, wherein the particle size of the activated carbon is 35-60 mesh.

4. The composite filler according to claim 1, wherein the particle size of the iron powder is 40-150um.

5 . The composite filler according to claim 1 , wherein the ratio of the parts by weight of the zeolite powder, activated carbon and iron powder is 2:1:0.5-0.8. 6 .

6 . The composite filler according to claim 1 , wherein the ratio of the parts by weight of the zeolite powder, activated carbon and iron powder is 2:1:0.5-0.7. 7 .

7 . The composite filler according to claim 1 , wherein the ratio of the parts by weight of the zeolite powder, activated carbon and iron powder is 2:1:0.5-0.6. 8 .

8. A method for preparing the denitrification and phosphorus removal composite filler according to any one of claims 1-7, characterized in that: comprising the following steps:

(1) zeolite particles are ground and sieved to obtain zeolite powder, for subsequent use;

(2) sieving activated carbon to obtain activated carbon powder, which is for subsequent use;

(3) Take iron powder with a particle size of 40-150um for use;

(4) according to the formula dosage, zeolite powder, iron powder and activated carbon powder are evenly mixed to obtain ingredients;

(5) the non-woven fabric is evenly sprayed with water to make the surface wet, and then the ingredients obtained in step (4) are coated on one side surface of the non-woven fabric;

(6) Lay the non-woven fabric wrapped with the ingredients in the curing room, with the side embedded with the ingredients facing up, control the temperature of the curing room to be 20-25°C, and the relative humidity to be less than 30%, and cure for 1-2 days to obtain Non-woven fabrics with embedded ingredients;

(7) Finally, take a piece of clean non-woven fabric and cover it on the non-woven fabric with embedded ingredients obtained in step (6), and sew it together by a non-woven fabric spot welding machine to prepare a denitrification and phosphorus removal filler.

9. method according to claim 8 is characterized in that: the sieving described in step (1), mesh number is 80-100 mesh.

10. method according to claim 8, is characterized in that: the sieving described in step (2) is to cross 35 mesh sieves at first, keep under sieve A, then sieve under material A is crossed 60 mesh sieves, take. Screen B to obtain activated carbon powder with desired particle size.